import asyncio
import configparser
import logging
import re

import yaboli
from yaboli.utils import *


logger = logging.getLogger("wtf")

class WtfDB(yaboli.Database):
	def initialize(self, db):
		with db:
			db.execute((
				"CREATE TABLE IF NOT EXISTS acronyms ("
					"acronym_id INTEGER PRIMARY KEY, "
					"acronym TEXT NOT NULL, "
					"explanation TEXT NOT NULL, "
					"author TEXT NOT NULL, "
					"deleted BOOLEAN NOT NULL DEFAULT 0"
				")"
			))
			db.create_function("p_lower", 1, str.lower)

	@yaboli.operation
	def add(self, db, acronym, explanation, author):
		with db:
			db.execute((
				"INSERT INTO acronyms (acronym, explanation, author) "
				"VALUES (?,?,?)"
			), (acronym, explanation, author))

	@yaboli.operation
	def find(self, db, acronym):
		c = db.execute((
			"SELECT acronym, explanation FROM acronyms "
			"WHERE NOT deleted AND p_lower(acronym) = ? "
			"ORDER BY acronym_id ASC"
		), (acronym.lower(),))
		return c.fetchall()

	@yaboli.operation
	def find_full(self, db, acronym):
		c = db.execute((
			"SELECT acronym_id, acronym, explanation, author FROM acronyms "
			"WHERE NOT deleted AND p_lower(acronym) = ? "
			"ORDER BY acronym_id ASC"
		), (acronym.lower(),))
		return c.fetchall()

	@yaboli.operation
	def get(self, db, acronym_id):
		with db:
			c = db.execute((
				"SELECT acronym FROM acronyms "
				"WHERE NOT deleted AND acronym_id=?"
			), (acronym_id,))
			res = c.fetchone()
			return None if res is None else res[0]

	@yaboli.operation
	def delete(self, db, acronym_id):
		with db:
			db.execute("UPDATE acronyms SET deleted = 1 WHERE acronym_id = ?", (acronym_id,))

class Wtf:
	SHORT_DESCRIPTION = "a database of explanations for words, acronyms and initialisms"
	DESCRIPTION = (
		"'wtf' is a database of explanations for words, acronyms and initialisms."
		" It is inspired by the linux wtf program and uses its acronyms,"
		" in addition to ones set by users.\n"
	)
	COMMANDS = (
		"!wtf is <term> - look up a term\n"
		"!wtf add <term> <explanation> - add a new explanation\n"
		"!wtf detail <term> - shows more info about the term's explanations\n"
		"!wtf delete <id> - delete explanation with corresponding id (look up the id using !wtf detail)\n"
		"!wtf replace <id> <explanation> - a shortcut for deleting and re-adding with a different explanation\n"
	)
	AUTHOR = "Created by @Garmy using github.com/Garmelon/yaboli\n"

	RE_IS      = r"\s*is\s+(\S+)\s*"
	RE_ADD     = r"\s*add\s+(\S+)\s+(.+)"
	RE_DETAIL  = r"\s*detail\s+(\S+)\s*"
	RE_DELETE  = r"\s*delete\s+(\d+)\s*"
	RE_REPLACE = r"\s*replace\s+(\d+)\s+(.+)"

	TRIGGER_WTF_IS = r"\s*wtf\s+is\s+(\S+)\s*"

	def __init__(self, dbfile):
		self.db = WtfDB(dbfile)

	@yaboli.command("wtf")
	async def command_wtf(self, room, message, argstr):
		match_is      = re.fullmatch(self.RE_IS,      argstr)
		match_add     = re.fullmatch(self.RE_ADD,     argstr)
		match_detail  = re.fullmatch(self.RE_DETAIL,  argstr)
		match_delete  = re.fullmatch(self.RE_DELETE,  argstr)
		match_replace = re.fullmatch(self.RE_REPLACE, argstr)

		if match_is:
			term = match_is.group(1)
			explanations = await self.db.find(term)
			if explanations:
				text = self._format_explanations(explanations)
				await room.send(text, message.mid)
			else:
				await room.send(f"{term!r} not found.", message.mid)

		elif match_add:
			term = match_add.group(1)
			explanation = match_add.group(2).strip()
			await self.db.add(term, explanation, message.sender.nick)
			logger.info(f"{mention(message.sender.nick)} added explanation: {term} - {explanation}")
			await room.send(f"Added explanation: {term} — {explanation}", message.mid)

		elif match_detail:
			term = match_detail.group(1)
			explanations = await self.db.find_full(term)
			if explanations:
				text = self._format_explanations_detailed(explanations)
				await room.send(text, message.mid)
			else:
				await room.send(f"{term!r} not found.", message.mid)

		elif match_delete:
			aid = match_delete.group(1)
			await self.db.delete(aid)
			await room.send(f"Deleted.", message.mid)
			logger.info(f"{mention(message.sender.nick)} deleted explanation with id {aid}")

		elif match_replace:
			aid = match_replace.group(1)
			explanation = match_replace.group(2).strip()
			term = await self.db.get(aid)
			print(term)
			if term is None:
				await room.send(f"No explanation with id {aid} exists.", message.mid)
			else:
				await self.db.delete(aid)
				logger.info(f"{mention(message.sender.nick)} deleted explanation with id {aid}")
				await self.db.add(term, explanation, message.sender.nick)
				logger.info(f"{mention(message.sender.nick)} added explanation: {term} - {explanation}")
				await room.send(f"Changed explanation: {term} — {explanation}", message.mid)

		else:
			text = "Usage:\n" + self.COMMANDS
			await room.send(text, message.mid)

	@yaboli.trigger(TRIGGER_WTF_IS, flags=re.IGNORECASE)
	async def trigger_wtf_is(self, room, message, match):
		term = match.group(1)
		explanations = await self.db.find(term)
		if explanations:
			text = self._format_explanations(explanations)
			await room.send(text, message.mid)
		else:
			await room.send(f"{term!r} not found.", message.mid)

	@staticmethod
	def _format_explanations(explanations):
		# Term, Explanation
		lines = [f"{t} — {e}\n" for t, e in explanations]
		return "".join(lines)

	@staticmethod
	def _format_explanations_detailed(explanations):
		# Id, Term, Explanation, Author
		lines = [f"{i}: {t} — {e} (by {mention(a, ping=False)})\n" for i, t, e, a in explanations]
		return "".join(lines)

class WtfBot(yaboli.Bot):
	SHORT_HELP = Wtf.SHORT_DESCRIPTION
	LONG_HELP = Wtf.DESCRIPTION + Wtf.COMMANDS + Wtf.AUTHOR

	def __init__(self, nick, wtfdbfile, cookiefile=None):
		super().__init__(nick, cookiefile=cookiefile)
		self.wtf = Wtf(wtfdbfile)

	async def on_send(self, room, message):
		await super().on_send(room, message)

		await self.wtf.trigger_wtf_is(room, message)

	async def on_command_specific(self, room, message, command, nick, argstr):
		if similar(nick, room.session.nick) and not argstr:
			await self.botrulez_ping(room, message, command)
			await self.botrulez_help(room, message, command, text=self.LONG_HELP)
			await self.botrulez_uptime(room, message, command)
			await self.botrulez_kill(room, message, command)
			await self.botrulez_restart(room, message, command)

	async def on_command_general(self, room, message, command, argstr):
		if not argstr:
			await self.botrulez_ping(room, message, command)
			await self.botrulez_help(room, message, command, text=self.SHORT_HELP)

		await self.wtf.command_wtf(room, message, command, argstr)

def main(configfile):
	logging.basicConfig(level=logging.INFO)

	config = configparser.ConfigParser(allow_no_value=True)
	config.read(configfile)

	nick = config.get("general", "nick")
	cookiefile = config.get("general", "cookiefile", fallback=None)
	wtfdbfile = config.get("general", "wtfdbfile", fallback=None)
	bot = WtfBot(nick, wtfdbfile, cookiefile=cookiefile)

	for room, password in config.items("rooms"):
		if not password:
			password = None
		bot.join_room(room, password=password)

	asyncio.get_event_loop().run_forever()

if __name__ == "__main__":
	main("wtf.conf")